I have been searching for the "final' answer to this question but still could not find it. Cisco doc is of no use, so it seems. Looked on the internet also, but I am not convinced what can be done about it. If someone could clear this up it will be a blast.
So, for many years NTP authentication was one-way. Only client had to authenticate the source i.e. only the device that gets its clock changed has to make sure that the source is valid. Makes sense. But since 12.4T Cisco made some changes and now if we are doing authentication we must make configs symmetrical. We could have done it before as well, but it was not mandatory. But I could not quite get if that is real mutual authentication or not. I looked up on the CLI etc. But it just does not click to me. I would like your opinion. And what about NTP peer authentication? Is that mutual auth? There is no real explanation about this command on Cisco doc as well. Best Regards, Bojan Zivancevic Network Engineer ---- _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
